CN106630439A - Chemical industrial organic wastewater treatment method - Google Patents

Abstract

The invention discloses a chemical industrial organic wastewater treatment method. The chemical industrial organic wastewater treatment method disclosed by the invention comprises the processes of CO2 pressurized iron-aluminum manganese composite powder reducing, anaerobic, aerobic and biological filtering tower treating and the like; the treated wastewater is discharged stably after reaching standards.

Description

The processing method of chemical industrial organic wastewater

Technical field

The present invention relates to a kind of processing method of chemical industrial organic wastewater.

Background technology

Organic chemical industry is one of mainstay of the national economy industry, the organic waste water pollutant COD concentration that its production is produced Height, complicated component particularly contains persistence organic pollutant（Containing phenyl ring and（Or）The organic matter of heterocycle etc.）When, intractability Greatly.If the waste water is not processed is directly discharged into environment, severe contamination will be caused to environment.At present containing persistence organic pollutant The processing method of chemical industrial organic wastewater mainly first carries out advanced oxidation（Such as iron-carbon micro-electrolysis, metal powder reduction, Fenton methods Deng）Pretreatment, then carries out a biological disposal upon.In advanced oxidation preprocessing process, sulfuric acid is generally needed to be added, caused at subsequent bio Reason（Such as anaerobism, hydrolysis acidification）During produce H₂S, produces more serious secondary pollution；Simultaneously because SO₄ ^2-To microorganism Growth has obvious inhibitory action, affects biological treatment effect, waste water to be difficult to stably reaching standard discharge.Exploitation secondary pollution is little, energy The processing method of the chemical industrial organic wastewater of stably reaching standard discharge has larger practical value.

The content of the invention

For the problem of current chemical industrial organic wastewater processing method, the purpose of the present invention be find secondary pollution it is little, can be steady Determine the processing method of the chemical industrial organic wastewater of qualified discharge, it is characterised in that pH value is more than into 5.0, and after adjusted pond is adjusted Chemical industrial organic wastewater containing persistence organic pollutant sends into voltage-resistant reactor, and cleaning iron-aluminum-manganese composite powder is added into reactor, And it is passed through industrial CO₂Reacted.The granularity of iron-aluminum-manganese composite powder is less than 180 mesh, each metal in iron-aluminum-manganese composite powder Content is not less than 5%（The iron-aluminum-manganese composite powder that return is used is not limited）.Every liter of waste water add iron-aluminum-manganese composite powder 5g～ 30g, the stirring reaction time is 1h～3h, and reaction temperature is 25 DEG C～60 DEG C, CO₂Pressure be 0.1MPa～1.0MPa.Reaction Waste water afterwards carries out solid-liquor separation, the iron-aluminum-manganese composite powder Returning reactor isolated.Waste water milk of lime after solid-liquor separation Or other alkaline matters adjust its pH value to 6.8～8.5,1h～3h are precipitated subsequently into sedimentation basin, irregularly from sedimentation basin Extract sludge out to be filtered, filter cake makees dangerous disposition of solid waste, filtrate returns sedimentation basin.The supernatant waste water of sedimentation basin send to be detested Oxygen reactor.Waste water stops 24h～120h in anaerobic reactor, and anaerobism temperature is 25 DEG C～55 DEG C.Waste water after anaerobism is entered Biology aerobic pond normal temperature is processed, and the Aerobic Process for Treatment time is 6h～16h.Waste water after Aerobic Process for Treatment enter sedimentation basin precipitation 1h～ 3h, irregularly extracts sludge out from sedimentation basin and is filtered, and filter cake makees dangerous disposition of solid waste, and filtrate returns Aerobic Pond. The supernatant waste water of sedimentation basin send multi-layer biological filter tower to process.The filler of biological filtering tower combined working is activated carbon or porous ceramic grain, per thickness degree For 1.0m～2.0m, gross thickness is 2m～6m.The dominant bacteria of biological filtering tower combined working is the red pseudomonas in photosynthetic bacteria （Rhodopseudomonas）.The hydraulic load of biological filtering tower combined working is 30 m³/m².d～90m³/m².d.The water outlet of biological filtering tower combined working reaches Mark discharge or reuse.

The object of the present invention is achieved like this, and chemical industrial organic wastewater is entered after iron-aluminum-manganese composite powder reduction reactor, gives up Larger molecular organicses in water, particularly persistence organic pollutant（Containing phenyl ring and（Or）The organic matter of heterocycle etc.）By iron aluminium Manganese composite powder reduces the effect of the strong reduction free radical for producing and destroys, and is that subsequent biochemical process creates favorable conditions.It is passed through pressure Power CO₂Purpose be to maintain iron-aluminum-manganese composite powder to reduce suitable pH value（2.0～5.0）, waste water milk of lime after reduction or Other alkaline matters adjust its pH value, to meet the requirement of follow-up anaerobic and aerobic process.The premenstrual waste water for stating process is in anaerobism During, by the effect of microorganism, larger molecular organicses further become small organic molecule, are that subsequent bio oxidation is created More favorable condition.By biological oxidation process, remaining most of organic matters are removed, while going to denitrogenate the pollutants such as phosphorus.It is useless Water finally enters activated carbon or porous ceramic grain biological filtering tower combined working, in the presence of microorganism, particularly red pseudomonas, further goes Except the pollutant such as organic matter and nitrogen phosphorus, it is ensured that the waste water stably reaching standard discharge after process.

Relative to existing method（Iron-carbon micro-electrolysis, metal powder reduction, Fenton methods etc.）, the outstanding advantages of the present invention are to adopt Use CO₂Replace now widely used sulfuric acid to make acidulant, do not introduce SO₄ ^2-Ion, essentially eliminates generation H₂The material base of S （Part chemical industrial organic wastewater contains S）, so as to significantly reduce H₂The pollution of S, while it also avoid SO₄ ^2-To anaerobic and aerobic mistake The inhibitory action of microorganism in journey, greatly improves the efficiency of biological treatment；Chemical plant all has boiler, what fuel combustion was produced CO₂Waste gas can make full use of, and can not only reduce processing cost, and can reduce carbon emission；Waste water energy after process stably reaches Mark discharge, with obvious economic benefit and environmental benefit.

Specific implementation method

Embodiment 1：1m is processed daily³Chemical industrial organic wastewater（Composition：pH6.7、COD_Cr11400mg/L、T-N52.5 mg/L、T- P35.1mg/L, colourity 250）, the reduction of Jing iron-aluminum-manganeses composite powder（1h、40℃、CO₂Pressure 0.6MPa, every liter of waste water add iron aluminium Manganese composite powder 25g）, anaerobism（PH8.5,72h, 25 DEG C～35 DEG C）, it is aerobic（12h）And biological filtering tower combined working（Porous ceramic grain packing layer is total Thickness 4m, hydraulic load 35m³/m².d）The COD of water outlet after process_CrFor 58mg/L, T-N14.1mg/L, T-P0.3mg/L, colourity 17。

Embodiment 2：5m is processed daily³Synthesis pharmaceutical organic wastewater（Composition：pH5.7、COD_Cr6500 mg/L、T-N31.3 Mg/L, T-P23.2mg/L, colourity 300）, the reduction of Jing iron-aluminum-manganeses composite powder（3h、25℃、CO₂Pressure 0.1MPa, every liter of waste water add Enter iron-aluminum-manganese composite powder 5g）, anaerobism（PH6.8,24h, 35 DEG C～55 DEG C）, it is aerobic（6h）And biological filtering tower combined working（Active carbon filler layer Gross thickness 2m, hydraulic load 90m³/m².d）The COD of water outlet after process_CrFor 46mg/L, T-N13.4mg/L, T-P0.3mg/L, color Degree 20.

Claims (1)

1. a kind of processing method of chemical industrial organic wastewater, it is characterised in that pH value is more than into 5.0, and after adjusted pond is adjusted Chemical industrial organic wastewater containing persistence organic pollutant sends into voltage-resistant reactor, and cleaning iron-aluminum-manganese composite powder is added into reactor, And it is passed through industrial CO₂Reacted, the granularity of iron-aluminum-manganese composite powder is less than 180 mesh, each metal in iron-aluminum-manganese composite powder Content is not less than 5%, and every liter of waste water adds iron-aluminum-manganese composite powder 5g～30g, and the stirring reaction time is 1h～3h, and reaction temperature is 25 DEG C～60 DEG C, CO₂Pressure be 0.1MPa～1.0MPa, reacted waste water carries out solid-liquor separation, the iron-aluminum-manganese isolated Composite powder Returning reactor, the waste water milk of lime or other alkaline matters after solid-liquor separation adjusts its pH value to 6.8～8.5, 1h～3h is precipitated subsequently into sedimentation basin, irregularly sludge is extracted out from sedimentation basin and is filtered, filter cake makees dangerous solid waste Thing is disposed, and filtrate returns sedimentation basin, and the supernatant waste water of sedimentation basin send anaerobic reactor, waste water anaerobic reactor stop 24h～ 120h, anaerobism temperature is 25 DEG C～55 DEG C, and into the process of biology aerobic pond normal temperature, the Aerobic Process for Treatment time is 6h to the waste water after anaerobism ～16h, the waste water after Aerobic Process for Treatment enters sedimentation basin and precipitates 1h～3h, irregularly extracts sludge out from sedimentation basin and is filtered, Filter cake makees dangerous disposition of solid waste, and filtrate returns Aerobic Pond, and the supernatant waste water of sedimentation basin send multi-layer biological filter tower to process, raw The filler of thing filter tower is activated carbon or porous ceramic grain, and filler gross thickness is 2m～6m, and the dominant bacteria of biological filtering tower combined working is photosynthetic thin Red pseudomonas in bacterium, the hydraulic load of biological filtering tower combined working is 30 m³/m².d～90m³/m².d, the standard water discharge of biological filtering tower combined working Discharge or reuse.